heavy duty polyurethane caster wheel 1.PU tread,PP centre, 2.bracket:6mm 3.ball/roller bearings 4.capacity:260-400kgs 4"-8" heavy duty polyurethane caster wheel function:suggest to use for most enviroment place like workshop,warehouses,industrial equipments,restaurents and other heavy duty equipments.Item numberwheel diameter(mm)wheel width(mm)overall height(mm) bracket finish bearing capacity( ...